TW201323159A - Anti-jamming ratchet wrench - Google Patents

Abstract

The present invention discloses an anti-jamming ratchet wrench, which comprises a main body configured with a first accommodation space and a second accommodation space; a driving member rotatably configured in the first accommodation space; a ratchet device configured in the second accommodation space of the main body, and the ratchet device comprises a first ratchet block, a second ratchet block and an elastic member; a reversing switch pivoted in the control groove for controlling the engagement relation between the ratchet device and the driving member; and, a position limiting member, in which the position limiting member is connected with the first ratchet block and the second ratchet block of the ratchet device, and the position limiting member may keep the first ratchet block and the second ratchet block of the ratchet device having a restraining gear ratio distance between the nearest two teeth thereof, where the restraining gear ratio distance is less than the jamming gear ratio distance, so as to effectively prevent the ratchet device form jamming.

Description

Anti-lock ratchet wrench

The present invention mainly discloses a ratchet wrench, especially a ratchet wrench that can prevent the ratcheting device from being stuck.

Please refer to the "Reinforcement structure for wrench head" patent of U.S. Patent No. 6,981,434, which is a ratchet wrench having a through hole for accommodating an engaging wheel, one of which is provided in the perforation. A recess and a space can accommodate two pawls, and the two jaws can be driven by a control member.

As shown in Figures 3, 6 and 7 of the 6,981,434 patent, the control member can switch the position of the two jaws respectively so that one of the two jaws can engage the coupling wheel so that the coupling wheel can be produced relative to the wrench One-way rotation function.

Such a wrench having two jaws has difficulty in processing. Referring to Figure 10, a diagram drawn in accordance with the patent No. 6,981,434, which shows a wrench 90 and a coupling wheel 92 disposed in the perforation 91. A pocket 93 communicating with the perforation 91 and two jaws 94 received in the pocket 93.

The reason is that the pocket 93 of the wrench 90 often causes a displacement of the pocket 93 and the perforation 91 due to processing errors. The perforation 91 has an axis CL, and the pocket 93 has a half moon shape so that its axis has a point P0, and the point P0 of the pocket is generally desired to fall on a reference line Y passing through the axis CL of the perforation 91, and the other passing axis CL The baseline X remains at an appropriate distance. However, after the tool for milling the groove 93 is machined with a certain number of wrenches 90, the outer diameter of the tool is reduced by wear, and after the replacement of the old and new tools, the new tool outer diameter is relative to the old tool. The diameter will be larger, which inevitably causes the pocket 93 of the wrench 90 to be somewhat larger and somewhat smaller.

Furthermore, in order to perform the processing of the pocket 93, in addition to the aforementioned problems, the coordinate setting of the tool under the knife, the control of the tool temperature and the wrench temperature during the machining, and the position setting of the wrench of the wrench 90 may cause each after processing. The position of the wrench 90 slot 93 is slightly different, so the machining error is very easy to occur. The points P1 and P2 shown in FIG. 10 are the axial positions of the pocket 93 which generates the up and down offset, and the points P3 and P4. Then, the axial position of the pocket 93 which produces the left and right offset is generated.

However, these offsets cause a machining error of the pocket 93, which will cause a problem in the meshing relationship between the two jaws 94 and the coupling wheel 92, and a loss of jamming between the two jaws 94 and the coupling wheel 92 may occur. As a result, the two claws 94 cannot be dialed, and these processing difficulties finally result in the product's defect rate cannot be reduced, which is not in line with market demand.

Referring to FIG. 10, when the wrench 90 has not been engaged with the natural state of the work object, and both of the claws 94 are not switched, when the pocket 93 is not elastically deformed, the spring 95 causes the left paw. 94 abuts against the wall of the pocket 93 and engages the coupling wheel 92, while the spring 95 abuts the right pawl 94 against the wall of the pocket 93 and engages the coupling wheel 92, while the two jaws 94 can still be disengaged from the coupling wheel When the meshing relationship of 92 is reached, the two pawls 94 at this time are in a stable state. When the two pawls 94 are in a steady state, the two pawls 94 form a safe tooth distance D1 between the two teeth closest to each other. Usually this is the ideal state belonging to the two jaws 94.

However, in fact, due to the aforementioned processing error, the meshing relationship between the two jaws 94 and the coupling wheel 92 in each of the processed wrenches 90 is good or bad, and the poor meshing relationship causes the wrench 90 to become a defective product. However, these problems are caused by the difference in size or deviation of the pockets 93. Referring to FIGS. 11 to 13 , a state in which the two jaws 94 and the coupling wheel 92 are stuck is formed.

When the wrench 90 is rotated counterclockwise to drive a locked workpiece 80, the reaction force of the workpiece 80 forces the coupling wheel 92 to drive the left pawl 94 and press the wall of the pocket 93 to make the pocket The wall of the 93 is elastically deformed. At this time, the right paw 94 is gradually disengaged from the teeth of the coupling wheel 92, and then the tooth peak of the right paw 94 is pushed outward by the spring 95 to slide over the tooth peak of the coupling wheel 92. At this time, the spring 95 pushes the right pawl 94 into the corner between the pocket 93 and the coupling wheel 92, causing the right pawl 94 to move outwardly away from the left paw 94, causing the right pawl 94 to move outward by one tooth. The distance is finally caught in the corner between the pocket 93 and the coupling wheel 92. At this time, the left paw 94 is pushed by the wall reaction force of the pocket 93, and the reaction force is directly transmitted to the right paw 94 via the coupling wheel 92, and When the right pawl 94 is pressed against the wall surface of the pocket 93, and the last two jaws 94 are unable to disengage from the engagement with the coupling wheel 92, the two jaws 94 are in a stuck state. When the two pawls 94 are in the stuck state, the two pawls 94 form a stuck tooth distance D2 between the two teeth closest to each other, and the stuck tooth distance D2 is greater than the safe tooth distance D1.

Due to machining errors, the two jaws 94 are prone to jamming and cause a lack of final plucking. If the problem is to be improved by improving the machining accuracy, the precision machining technology will result in huge costs and costs. In addition, it is not widely accepted by the market. In addition, problems such as machining errors or positioning position errors are also likely to cause problems such as the above-mentioned jam. Therefore, the applicant has filed this patent application to solve the foregoing. Problems.

The anti-seize ratchet wrench of the present invention comprises a body, which is provided with a first accommodating space and a second accommodating space; a driving member is rotatably disposed in the first accommodating space; In the second accommodating space of the body, the ratcheting device comprises a first ratchet block, a second ratchet block and an elastic member; a reversing switch is pivoted in the control slot and can control the swaying device and the driving member a meshing relationship; a limiting member coupled to the first ratchet block and the second ratchet block of the ratcheting device, the limiting member capable of causing the first ratchet block and the second ratchet of the ratcheting device The tooth block maintains a restraining tooth distance between the two tooth portions closest to each other, and the restraining tooth distance is smaller than the stuck tooth distance, so that the ratchet device effectively avoids the stuck state.

The anti-seize ratchet wrench of the present invention, wherein the limiting member has a first limiting portion and a second limiting portion, and the first limiting portion and the second limiting portion are respectively located at two sides of the limiting member, first One side of the ratchet block is provided with a first linking portion, and one side of the second ratchet block is provided with a second linking portion, and the first limiting portion of the limiting member is connected to the first linkage of the first ratchet block a second limiting portion of the limiting member is coupled to the second linking portion of the second ratchet block, such that the number of restraining teeth between the first ratchet block and the second ratchet block is less than the number of dead teeth distance.

The anti-seize ratchet wrench of the present invention, wherein the limiting member has a sliding groove, and the first limiting portion and the second limiting portion are respectively formed at two ends of the sliding groove, and the sliding groove can Providing a first sliding portion of the first ratchet block and a second linking portion of the second ratchet block to generate a relative sliding relationship therein.

The anti-seize ratchet wrench of the present invention, wherein the first linkage portion of the first ratchet block drives the first limiting portion of the limiting member to move the limiting member, and the limiting member can drive the second ratchet block The second ratchet block moves the second ratchet block, and the limit member does not drive the changeover switch to move, thereby, if the commutation switch has machining error or there is an error in the positioning position, the ratchet does not occur. The problem of the device being stuck.

The anti-seize ratchet wrench of the present invention, wherein a blocking portion is formed at a middle portion of the sliding groove of the limiting member, and the blocking portion can provide a blocking effect when the first linking portion of the first ratchet block moves inward, avoiding The elastic member is excessively compressed and damaged. Similarly, the blocking portion can also provide the blocking effect when the second linkage portion of the second ratchet block moves inward, thereby avoiding excessive compression and damage of the elastic member.

The anti-seize ratchet wrench of the present invention, wherein the restraint tooth distance is equal to or greater than the safe tooth distance, so that the ratchet device can be smoothly maintained in a stable state.

Other objects, advantages and novel features of the invention will be apparent from the description and appended claims.

The present invention has been described with reference to the preferred embodiments and the accompanying drawings, which are intended to be illustrative only, and are not limited by the structure.

Referring to Figures 1 to 3, a first embodiment of the anti-seize ratchet wrench of the present invention is shown. The ratchet wrench 10 of the present invention comprises a body 20, a driving member 30, a ratcheting device 40, a reversing switch 50 and a limiting member 60. The limiting member 60 prevents the ratcheting device 40 from being stuck in the driving member. Between the 30 and the body 20, the problem of the stuck state of the ratcheting device 40 is effectively avoided; wherein: the body 20 includes a head portion 21, and the head portion 21 of the body 20 has a rotation axis CL when the user operates the body 20 At this time, the body 20 can be rotated about the rotation axis CL of the head portion 21 as a center of rotation.

The head 21 includes a first face 211 and a second face 212. The first surface 211 and the second surface 212 are parallel to each other and spaced apart along the rotation axis CL.

The head 21 is provided with a circular accommodating space 22 extending along the rotation axis CL and extending through the first surface 211 and the second surface 212. The first accommodating space 22 is recessed with a second accommodating space 23 The second accommodating space 23 has a half moon shape and the axis of the second accommodating space 23 is parallel to the rotation axis CL. The second accommodating space 23 has a first abutting surface 231 and a second abutting surface 232 adjacent to the first accommodating space 22, and the first abutting surface 231 and the second abutting surface 232 are respectively Located on both sides of the second accommodating space 23.

The head 21 is provided with a control groove 24 penetrating the first surface 211 and communicating with the second accommodating space 23. In the embodiment, the control slot 24 is located on a side of the second accommodating space 23 away from the first accommodating space 22 .

The driving member 30 is rotatably disposed in the first accommodating space 22 of the head portion 21 of the body 20, and the driving member 30 is rotatable relative to the head portion 21 with the rotation axis CL as an axis. The outer peripheral ring of the driving member 30 is provided with a plurality of teeth 31, and the teeth 31 of the driving member 30 are received in the first accommodating space 22 of the body 20.

The driving member 30 has a driving portion 32, and the driving portion 32 can be used to drive the workpiece to rotate. In the present embodiment, the drive unit 32 is in the form of a polygonal hole.

The ratcheting device 40 is disposed in the second accommodating space 23 of the body 20, and the ratcheting device 40 can be selectively engaged with the driving member 30.

The ratchet device 40 includes a first ratchet block 41, a second ratchet block 42 and an elastic member 43. The elastic member 43 is disposed between the first ratchet block 41 and the second ratchet block 42. A ratchet block 41 and a second ratchet block 42 are respectively moved toward both sides of the second accommodation space 23.

A plurality of teeth 411 are disposed on a surface of the first ratchet block 41 facing the first accommodating space 22, and the tooth portion 411 of the first ratchet block 41 can be engaged with the tooth portion of the driving member 30 by the pushing of the elastic member 43. 31. One side of the first ratchet block 41 is provided with a first linking portion 412. The first interlocking portion 412 in this embodiment has a cylindrical shape.

The teeth of the second ratchet block 42 facing the first accommodating space 22 are provided with a plurality of tooth portions 421, and the tooth portions 421 of the second ratchet block 42 can be engaged with the teeth of the driving member 30 by the pushing of the elastic members 43. 31. A second linkage portion 422 is disposed on one side of the second ratchet block 42. The second interlocking portion 422 in this embodiment has a cylindrical shape. The design principle of the second ratchet block 42 is the same as that of the first ratchet block 41, so the details of the same principle will not be described in detail later.

As shown in FIG. 3, when the ratchet wrench 10 is not engaged with the natural state of the work object, and the first ratchet block 41 and the second ratchet block 42 are not switched positions, when the second accommodation space 23 is not In a state in which the elastic deformation occurs, the elastic member 43 abuts the first ratchet block 41 against the first abutting surface 231 and engages with the driving member 30, and the elastic member 43 abuts the second ratchet block 42 against the second abutting. When the front surface 232 is engaged with the driving member 30, and the first ratchet block 41 and the second ratchet block 42 are still able to disengage from the meshing relationship with the driving member 30, the ratcheting device 40 is in a stable state.

When the ratcheting device 40 is in the steady state, the first ratchet block 41 and the second ratchet block 42 of the ratcheting device 40 form a safe tooth distance D1 between the two tooth portions 411, 421 closest to each other. In the embodiment, the safety gear distance D1 is the distance between four teeth peaks on the outer circumference of the driving member 30.

When the driving member 30 drives the first ratchet block 41 to press the first abutting surface 231 to elastically deform the second accommodating space 23, if the elastic member 43 abuts the first ratchet block 41 The first abutting surface 231 is engaged with the driving member 30, and the elastic member 43 abuts the second ratchet block 42 against the second abutting surface 232 and engages the driving member 30, thereby causing the first ratchet block 41 to When the second ratchet block 42 has been unable to disengage from the meshing relationship with the driving member 30, the ratcheting device 40 is in a stuck state. When the ratcheting device 40 is in the stuck state, the first ratchet block 41 and the second ratchet block 42 of the ratcheting device 40 form a dead tooth distance D2 between the two tooth portions 411, 421 closest to each other (see Figure 13), the stuck tooth distance D2 is greater than the safe tooth distance D1.

In short, the ratchet device 40 is movable between a steady state and a stuck state, and when the ratchet device 40 is in the steady state, the number of safe teeth is maintained between the first ratchet block 41 and the second ratchet block 42. The distance D1, if the ratcheting device 40 is in the stuck state, maintains the stuck tooth distance D2 between the first ratchet block 41 and the second ratchet block 42.

The reversing switch 50 is pivotally disposed on the control slot 24 and can control the ratcheting device 40 located in the second accommodating space 23 to control the meshing relationship between the swaying device 40 and the driving member 30.

The diverter switch 50 is movable between a first position, a second position and a third position. When the reversing switch 50 is in the first position, the first ratchet block 41 is separated from the driving member 30. When the reversing switch 50 is in the second position, the second ratchet block 42 is separated from the driving member 30 when the reversing switch When the second position is 50, the first ratchet block 41 and the second ratchet block 42 are both engaged with the driving member 30.

The reversing switch 50 includes a first urging portion 51 and a second urging portion 52. The first urging portion 51 and the second urging portion 52 extend into the second accommodating space 23 and can be controlled to be located in the second accommodating portion. The ratcheting device 40 in the space 23 is as shown in FIG. When the reversing switch 50 is in the first position, the first pushing portion 51 can push the first ratchet block 41 of the ratcheting device 40 to separate the first ratchet block 41 from the driving member 30. At this time, the driving member 30 can be single. Turn to the direction. When the reversing switch 50 is in the second position, the second pushing portion 52 can push the second ratchet block 42 of the ratcheting device 40 to separate the second ratchet block 42 from the driving member 30. At this time, the driving member 30 can be single. Turn to the direction.

In the embodiment, the first pushing portion 51 can selectively push the first linking portion 412 of the first ratchet block 41 of the ratcheting device 40, and the second pushing portion 52 can selectively push the second ratchet of the ratcheting device 40. The second interlocking portion 422 of the tooth block 42.

An opening portion 53 is further formed between the first pushing portion 51 and the second pushing portion 52. When the switching switch 50 is in the third position, the first linking portion 412 of the first ratchet block 41 of the ratcheting device 40 is The second linking portion 422 of the second ratchet block 42 is simultaneously located in the open portion 53 of the reversing switch 50. The first ratchet block 41 and the second ratchet block 42 are both engaged with the driving member 30, so that the driving member 30 cannot be opposite. The head 21 of the body 20 is unidirectionally rotated. At this time, the body 20 is pulled to rotate the driving portion 32 of the driving member 30 together with the head portion 21.

A positioning device 54 is further disposed between the reversing switch 50 and the body 20, and the position of the reversing switch 50 corresponding to the positioning device 54 is formed with a plurality of positioning portions 55, and the positioning device 54 can be positioned at the positioning portion 55 of the reversing switch 50. The reversing switch 50 is held in the desired position.

The positioning device 54 is disposed in a receiving groove 25 of the body 20, and the positioning device 54 includes an elastic body 541 disposed in the receiving groove 25 and a positioning between the elastic body 541 and the reversing switch 50. The member 542 can be selectively positioned on the positioning portion 55 of the reversing switch 50 by the pushing of the elastic body 541. In the present embodiment, the positioning member 542 is in the form of a steel ball.

The limiting member 60 is coupled to the first ratchet block 41 and the second ratchet block 42 of the ratcheting device 40. The limiting member 60 can enable the first ratchet block 41 and the second ratchet block 42 of the ratcheting device 40. A restraining tooth distance D3 (as shown in FIG. 4) is maintained between the two tooth portions 411 and 421 closest to each other, and the restraining tooth distance D3 is smaller than the stuck tooth distance D2, thereby the limiting member The first ratchet block 41 and the second ratchet block 42 of the ratcheting device 40 are not locked at the same time between the driving member 30 and the second accommodating space 23, thereby effectively preventing the ratcheting device 40 from being stuck. The problem. Further, even if there is a problem of processing error between the second accommodating space 23 and the first accommodating space 22, the missing of the swaying device 40 will no longer occur, so that the yield of the product is improved, and It will lead to high cost of precision machining and is quite in line with market demand.

Further, the restraint tooth distance D3 is equal to or larger than the safe tooth distance D1, so that the ratcheting device 40 can be smoothly maintained in a stable state.

The limiting member 60 has a first limiting portion 61 and a second limiting portion 62. The first limiting portion 61 and the second limiting portion 62 are respectively located at two sides of the limiting member 60. The first limiting portion 61 of the limiting member 60 is coupled to the first linking portion 412 of the first ratchet block 41, and the second limiting portion 62 of the limiting member 60 is coupled to the second linking portion of the second ratchet block 42. 422. The restraining tooth distance D3 held between the first ratchet block 41 and the second ratchet block 42 is smaller than the stuck tooth distance D2.

In the embodiment, the limiting member 60 has a sliding groove 63. The first limiting portion 61 and the second limiting portion 62 are respectively formed at two ends of the sliding groove 63. The sliding groove 63 can provide a relative sliding relationship between the first linking portion 412 of the first ratchet block 41 and the second linking portion 422 of the second ratchet block 42.

When the first linking portion 412 of the first ratchet block 41 drives the first limiting portion 61 of the limiting member 60 to move the limiting member 60 along the first ratchet block 41, the second limiting portion of the limiting member 60 The second linkage portion 422 of the second ratchet block 42 can be driven to move the second ratchet block 42 downward, but the limiting member 60 does not drive the changeover switch 50 to move. Therefore, if there is a machining error or an error in the positioning position of the change-over switch 50, the problem that the ratcheting device 40 is stuck does not occur.

Referring to FIG. 4, when the reversing switch is in the third position, when the body 20 is rotated counterclockwise to drive a locked workpiece 80, the reaction force of the workpiece 80 forces the driving member 30 to drive the first ratchet. The block 41 presses the first abutting surface 231 of the second accommodating space 23 to elastically deform the first abutting surface 231 of the second accommodating space 23, and the first linking portion of the first ratchet block 41 The first limiting portion 61 of the limiting member 60 moves the limiting member 60 along the first ratchet block 41. At this time, the second limiting portion 62 of the limiting member 60 can drive the second ratchet block 42. The second linkage portion 422 moves the second ratchet block 42 downward, but the limiting member 60 does not move the reversing switch 50 to disengage the second ratchet block 42 from the tooth portion 31 of the driving member 30.

Since the restraining tooth number distance D3 is smaller than the stuck tooth number distance D2, the limiting member 60 causes the first ratchet block 41 and the second ratchet block 42 of the ratcheting device 40 not to be stuck at the same time in the driving member 30 and the first Between the two accommodating spaces 23, the problem that the ratcheting device 40 is stuck is effectively avoided. Then, when the body 20 is no longer pulled, the second accommodating space 23 returns to the original state, and returns to the state as shown in FIG. 3, the elastic member 43 abuts the first ratchet block 41 against the first abutting surface 231 and is engaged with the driving. The member 30, while the elastic member 43 abuts the second ratchet block 42 against the second abutting surface 232 and is engaged with the driving member 30, and the first ratchet block 41 and the second ratchet block 42 can still be disengaged from the driving member. With the meshing relationship of 30, the ratcheting device 40 can still smoothly return to the steady state.

Referring to FIG. 5, when the position switching operation is performed on the change-over switch 50, the switch 50 can smoothly switch the ratchet device 40, thereby effectively avoiding the problem of jamming due to machining errors.

Referring to Figures 6 through 9, a second embodiment of the present invention is substantially the same as the first embodiment except that the position of the switch 50a is different and the structure of the limit member 60 is different. The rest of the same structure will not be described here.

The head 21 is provided with a control groove 24a penetrating the first surface 211 and communicating with the second accommodating space 23. In the present embodiment, the control slot 24a is simultaneously communicated with the first accommodating space 22, and the axis of the control slot 24a is collinear with the axis of rotation CL, so that the control slot 24a is disposed in the first accommodating space 22 and the head 21 Between the first faces 211.

The first ratchet block 41 is formed with a first pushing surface 413 corresponding to the position of the control groove 24a. The second ratchet block 42 is formed with a second pushing surface 423 corresponding to the position of the control groove 24a.

The reversing switch 50a is provided in a hollow ring shape, and the reversing switch 50a includes a shaft hole 56. The shaft hole 56 of the reversing switch 50a is sleeved on the driving member 30, so that the reversing switch 50a and the driving member 30 can be Produce a relative pivotal relationship.

The diverter switch 50a is movable between a first position, a second position and a third position. When the reversing switch 50a is in the first position, the first ratchet block 41 is separated from the driving member 30. When the reversing switch 50a is in the second position, the second ratchet block 42 is separated from the driving member 30 when the reversing switch When the 50a is in the third position, the first ratchet block 41 and the second ratchet block 42 are both engaged with the driving member 30.

The reversing switch 50a includes a first urging portion 51a and a second urging portion 52a. The first urging portion 51a and the second urging portion 52a extend into the second accommodating space 23, and can be controlled to be located in the second accommodating portion. The ratcheting device 40 in the space 23. When the reversing switch 50a is in the first position, the first pushing portion 51a can push the first ratchet block 41 of the ratcheting device 40 to separate the first ratchet block 41 from the driving member 30. At this time, the driving member 30 can be single. Turn to the direction. When the reversing switch 50a is in the second position, the second pushing portion 52a can push the second ratchet block 42 of the ratcheting device 40 to separate the second ratchet block 42 from the driving member 30. At this time, the driving member 30 can be single. Turn to the direction.

In the present embodiment, the first pushing portion 51a can selectively push the first pushing surface 413 of the first ratchet block 41, and the second pushing portion 52a can selectively push the second pushing surface 423 of the second ratchet block 42. Further, the first urging portion 51a and the second urging portion 52a are formed in an arc shape and are movable in an arc in the annular control groove 24a. The thickness of the first urging portion 51a in the shape of an arc is larger than the tooth height of the tooth portion 411 of the first ratchet block 41, so that when the first urging portion 51a separates the first ratchet block 41 from the driving member 30, The first ratchet block 41 loses its meshing relationship with the driving member 30, and the first ratchet block 41 still pushes the first pushing surface 413 of the first ratchet block 41 against the first through the pushing of the elastic member 43. The first abutting surface 231 of the urging portion 51a and the second accommodating space 23 maintains the first ratchet block 41 and the second ratchet block 42 with a good and stable swaying effect. Similarly, the second urging portion 52a having a curved sheet shape is also the same principle, and thus will not be described again.

An opening portion 53a is further formed between the first pushing portion 51a and the second pushing portion 52a. When the switching switch 50a is in the third position, the first pushing surface 413 of the first ratchet block 41 of the ratcheting device 40 is The second pushing surface 423 of the second ratchet block 42 is simultaneously located in the open portion 53a of the reversing switch 50a. The first ratchet block 41 and the second ratchet block 42 are both engaged with the driving member 30, so that the driving member 30 cannot be opposite. The head 21 of the body 20 is unidirectionally rotated. At this time, the body 20 is pulled to rotate the driving portion 32 of the driving member 30 together with the head portion 21.

In the embodiment, a stop portion 64 is formed at a middle portion of the sliding groove 63 of the limiting member 60, and the blocking portion 64 can provide a blocking effect when the first linking portion 412 of the first ratchet block 41 moves inward. In order to avoid excessive compression and damage of the elastic member 43, similarly, the blocking portion 64 can also provide the blocking effect when the second linking portion 422 of the second ratchet block 42 moves inward, thereby preventing the elastic member 43 from being excessively compressed and damaged. .

Referring to FIG. 8, when the reversing switch is in the third position, when the body 20 is rotated counterclockwise to drive a locked workpiece 80, the reaction force of the workpiece 80 forces the driving member 30 to drive the first ratchet. The block 41 presses the first abutting surface 231 of the second accommodating space 23 to elastically deform the first abutting surface 231 of the second accommodating space 23, and the first linking portion of the first ratchet block 41 The first limiting portion 61 of the limiting member 60 moves the limiting member 60 along the first ratchet block 41. At this time, the second limiting portion 62 of the limiting member 60 can drive the second ratchet block 42. The second linkage portion 422 moves the second ratchet block 42 downward, but the limiting member 60 does not move the reversing switch 50 to disengage the second ratchet block 42 from the tooth portion 31 of the driving member 30.

Since the restraining tooth number distance D3 is smaller than the stuck tooth number distance D2, the limiting member 60 causes the first ratchet block 41 and the second ratchet block 42 of the ratcheting device 40 not to be stuck at the same time in the driving member 30 and the first Between the two accommodating spaces 23, the problem that the ratcheting device 40 is stuck is effectively avoided. Then, when the body 20 is no longer pulled, the second accommodating space 23 is restored to the original state, and the elastic member 43 abuts the first ratchet block 41 against the first abutting surface 231 and is engaged with the driving. The member 30, while the elastic member 43 abuts the second ratchet block 42 against the second abutting surface 232 and is engaged with the driving member 30, and the first ratchet block 41 and the second ratchet block 42 can still be disengaged from the driving member. With the meshing relationship of 30, the ratcheting device 40 can still return to a steady state.

Referring to Fig. 9, when the position switching operation is performed on the changeover switch 50a, the changeover switch 50a can smoothly switch the ratcheting device 40, thereby effectively avoiding the problem of jamming due to machining errors.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, so that the numerical value is changed or the equivalent element is replaced, or the equivalent of the scope of the patent application of the present invention. Changes and modifications are still within the scope of the invention patent.

10. . . Ratchet wrench

20. . . Ontology

twenty one. . . head

211. . . First side

212. . . Second side

twenty two. . . First accommodation space

twenty three. . . Second accommodation space

231. . . First abutment

232. . . Second abutment

twenty four. . . Control slot

24a. . . Control slot

25. . . Locating slot

30. . . Drive

31. . . Tooth

32. . . Drive department

40. . . Throchet device

41. . . First ratchet block

411. . . Tooth

412. . . First linkage

413. . . First change surface

42. . . Second ratchet block

421. . . Tooth

422. . . Second linkage

423. . . Second change surface

43. . . Elastic part

50. . . Reversing switch

51. . . First shifting section

52. . . Second shifting

53. . . Open department

54. . . Positioning means

541. . . Elastomer

542. . . Positioning member

55. . . Positioning department

56. . . Shaft hole

50a. . . Reversing switch

51a. . . First shifting section

52a. . . Second shifting

53a. . . Open department

60. . . Limiter

61. . . First limit

62. . . Second limit

63. . . Slip groove

64. . . Stop

80. . . Work object

90. . . wrench

91. . . perforation

92. . . Combination wheel

93. . . Crate

94. . . Claw

95. . . spring

CL. . . Axis

D1. . . Safe tooth distance

D2. . . Card dead tooth distance

D3. . . Binding distance

P0. . . point

P1. . . point

P2. . . point

P3. . . point

P4. . . point

X. . . Baseline

Y. . . Baseline

Figure 1 is a perspective view showing the first embodiment of the anti-seize ratchet wrench of the present invention.

2 is an exploded perspective view of the ratchet device and the limiting member of the first embodiment of the anti-seize ratchet wrench of the present invention.

Figure 3 is a cross-sectional structural view showing the first embodiment of the anti-seize ratchet wrench of the present invention, showing that the ratcheting device is in a stable state.

Figure 4 is a cross-sectional structural view showing the first embodiment of the anti-seize ratchet wrench of the present invention, showing that the limiting member keeps the ratcheting device within the distance of the stuck tooth.

Figure 5 is a cross-sectional structural view showing the first embodiment of the anti-seize ratchet wrench of the present invention, showing that the reversing switch can be switched to the second position.

Figure 6 is a perspective perspective view showing a second embodiment of the anti-seize ratchet wrench of the present invention.

Figure 7 is a cross-sectional structural view showing the second embodiment of the anti-seize ratchet wrench of the present invention, showing that the ratcheting device is in a stable state.

Figure 8 is a cross-sectional structural view showing a second embodiment of the anti-seize ratchet wrench of the present invention, showing that the limiting member keeps the ratcheting device within the distance of the stuck tooth.

Figure 9 is a cross-sectional structural view showing a second embodiment of the anti-seize ratchet wrench of the present invention, showing that the reversing switch can be switched to the second position.

Figure 10: Schematic diagram of the structure of a conventional ratchet wrench.

Figure 11: Schematic diagram of the structure of a conventional ratchet wrench.

Figure 12: Schematic diagram of the structure of a conventional ratchet wrench.

Figure 13 is a schematic view of the structure of a conventional ratchet wrench, showing that the ratcheting device is in a stuck state.

10. . . Ratchet wrench

20. . . Ontology

twenty one. . . head

twenty two. . . First accommodation space

twenty three. . . Second accommodation space

231. . . First abutment

232. . . Second abutment

twenty four. . . Control slot

25. . . Locating slot

30. . . Drive

31. . . Tooth

32. . . Drive department

40. . . Throchet device

41. . . First ratchet block

411. . . Tooth

412. . . First linkage

42. . . Second ratchet block

421. . . Tooth

422. . . Second linkage

43. . . Elastic part

50. . . Reversing switch

51. . . First shifting section

52. . . Second shifting

53. . . Open department

542. . . Positioning member

55. . . Positioning department

60. . . Limiter

61. . . First limit

62. . . Second limit

63. . . Slip groove

80. . . Work object

D3. . . Binding distance

Claims (13)

An anti-seize ratchet wrench includes: a body including a head, the head is provided with a first accommodating space, and the first accommodating space is provided with a second accommodating space. The head is provided with a control slot that communicates with the second accommodating space; a driving member is rotatably disposed in the first accommodating space of the body head, and the outer peripheral ring of the driving member is provided with a plurality of a toothing device; a ratcheting device is disposed in the second receiving space of the body, and the ratcheting device is capable of selectively engaging with the driving member, the rocking device comprising a first ratchet block a second ratchet block and an elastic member, the elastic member is disposed between the first ratchet block and the second ratchet block, and the first ratchet block and the second ratchet block are respectively oriented Moving on both sides of the second accommodating space, the first ratchet block is provided with a plurality of teeth, the teeth of the first ratchet block can be engaged with the teeth of the driving member, and the second ratchet block is provided with a plurality of teeth a tooth portion, the tooth portion of the second ratchet block is engageable with the tooth portion of the driving member, the ratchet The device is movable between a steady state and a stuck state, and when the ratchet device is in a steady state, the first ratchet block and the second ratchet block maintain a safe tooth distance, if the ratchet device is located In the stuck state, the first ratchet block and the second ratchet block maintain a dead tooth distance; a reversing switch is pivotally disposed in the control slot and can control the ratchet device to control the Engagement relationship between the ratchet device and the driving member; a limiting member coupled to the first ratchet block and the second ratchet block of the ratcheting device, the limiting member capable of causing the swaying The first ratchet block of the device and the second ratchet block maintain a restraining tooth distance between the two tooth portions closest to each other, and the restraining tooth distance is less than the stuck tooth distance to prevent the ratchet device from being Dead state. The anti-seize ratchet wrench of claim 1, wherein the limiting member has a first limiting portion and a second limiting portion, wherein the first limiting portion and the second limiting portion are respectively located One side of the first ratchet block is provided with a first linking portion, and one side of the second ratchet block is provided with a second linking portion, and the first limiting portion of the limiting member The second limiting portion of the limiting member is connected to the second linking portion of the second ratchet block. The anti-seize ratchet wrench of claim 2, wherein the limiting member has a sliding groove, and the first limiting portion and the second limiting portion are respectively formed at two ends of the sliding groove The sliding groove can provide a relative sliding relationship between the first linking portion of the first ratchet block and the second linking portion of the second ratchet block. The anti-seize ratchet wrench of claim 3, wherein the first linkage portion of the first ratchet block drives the first limiting portion of the limiting member to move the limiting member, the limiting member The second linkage portion of the second ratchet block can be driven to move the second ratchet block, and the limiting member does not drive the changeover switch to move. The anti-seize ratchet wrench of claim 4, wherein a stop is formed at a middle portion of the slip groove of the limiting member. The anti-seize ratchet wrench of any one of claims 1 to 5, wherein the restraint tooth distance is equal to or greater than the safe tooth distance. The anti-seize ratchet wrench of any one of claims 1 to 5, wherein the reversing switch is movable between a first position, a second position and a third position, and the reversing switch The first urging portion is configured to have a first urging portion and a second urging portion. When the reversing switch is in the first position, the first urging portion can push the first ratchet block of the ratcheting device to make the first ratchet block Separating from the driving member, when the switching switch is in the second position, the second pushing portion can push the second ratchet block of the ratcheting device to separate the second ratchet block from the driving member. When the reversing switch is in the third position, the first ratchet block and the second ratchet block are both engaged with the driving member. The anti-seize ratchet wrench of claim 7, wherein the second accommodating space has a first abutting surface and a second abutting surface adjacent to the first accommodating space, the An abutting surface and a second abutting surface are respectively located at two sides of the second accommodating space. When the reversing switch is in the third position, the elastic member abuts the first ratchet block against the first abutting Abutting and engaging the driving member, the elastic member abutting the second ratchet block against the second abutting surface and engaging the driving member, and the first ratchet block and the second ratchet block It is still possible to disengage from the meshing relationship with the drive member. The anti-seize ratchet wrench of claim 8, wherein the control slot is located on a side of the second accommodating space that is away from the first accommodating space, the first urging portion is capable of selectively pushing the swaying device a first linking portion of the first ratchet block, the second pushing portion selectively pushing the second linking portion of the second ratchet block of the ratcheting device, between the first pushing portion and the second pushing portion Forming an open portion, the first linkage portion of the first ratchet block of the ratchet device and the second linkage portion of the second ratchet block are simultaneously located in the reverse direction when the switch is in the third position In the open portion of the switch, the first ratchet block and the second ratchet block are both engaged with the driving member, so that the driving member cannot be unidirectionally rotated relative to the body head. The anti-seize ratchet wrench of claim 8, wherein the control slot is simultaneously connected to the first accommodating space, and the control slot ring is disposed in the first accommodating space, and the reversing switch is configured as a hollow ring. And the reversing switch includes a shaft hole, and the shaft hole of the reversing switch is sleeved on the driving member to enable a relative pivotal relationship between the reversing switch and the driving member. The anti-seize ratchet wrench of claim 10, wherein the first ratchet block is formed with a first sliding surface corresponding to the position of the control slot, and the two ratchet blocks are formed corresponding to the position of the control slot a second pushing surface capable of selectively pushing a first pushing surface of the first ratchet block of the ratcheting device, the second pushing portion being capable of selectively pushing a second ratchet block of the ratcheting device a second pushing surface, an opening portion is further formed between the first pushing portion and the second pushing portion, and the first ratchet block of the ratcheting device is first when the switching switch is in the third position The pushing surface and the second changing surface of the second ratchet block are simultaneously located in the open portion of the reversing switch, and the first ratchet block and the second ratchet block are both engaged with the driving member, so that the driving member cannot be opposite The body head is unidirectionally rotated. The anti-seize ratchet wrench of claim 8, wherein a positioning device is further disposed between the reversing switch and the body, and the reversing switch is formed with a plurality of positioning portions corresponding to the position of the positioning device. The positioning device is disposed in a receiving slot of the body, and the positioning device includes a resilient body disposed in the receiving slot and a positioning member disposed between the elastic body and the switching switch. The positioning member can be selectively positioned on the positioning portion of the reversing switch by the pushing of the elastic body. The anti-seize ratchet wrench of claim 12, wherein the head of the body has an axis of rotation, the head including a first side and a second side, the first side and the second side Parallel to each other and spaced apart along the axis of rotation, the first accommodating space extends along the axis of rotation and extends through the first face and the second face, and the drive member is rotatable relative to the head about the axis of rotation.